Commercial silk is obtained from : from Biology NEET Year 2003 F

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

All worms are :

  • triploblastic

  • segmented

  • endo-parasites

  • free - living


2.

Pearl oyster is a mollusc which belongs to class :

  • Cephalopoda

  • Pelecypoda

  • Scaphopoda

  • Gastropoda


3.

Which of the following is a coelenterate ?

  • Sea lily

  • Sea squirt

  • Sea cucumber

  • Sea fan


4.

As per classification which of the following is correct ?

  • Ascaris, Pheretima, Grasshopper

  • Hydra, Pterido, Leucosolenia

  • Starfish, Grasshopper, Solen

  • Pila, Dentalium, Octopus


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5.

Kaziranga National Park is famous for :

  • Rhinoceros

  • Tiger

  • Asiatic lion

  • Nilgai


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6.

Commercial silk is obtained from :

  • cocoon/ pupa

  • caterpiller

  • adult moth

  • both egg and adult moth


A.

cocoon/ pupa

Commercial silk is obtained by putting cocoons i.e. caterpiller covered by silk thread) in hot water or treating them with fumigation. The pupae are killed and the cocoons are assorted according to their colours. After assorting the thread is first unwinded and then winded with the help of wheels.


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7.

Continuous bleeding from an injured part of body is due to deficiency of :

  • Vitamin A

  • Vitamin B

  • Vitamin K

  • Vitamin E


8.

In which of the following class of Annelida, one pair ovaries and several pair testes are found ?

  • Archiannelida

  • Hirudinea

  • Oligochaeta

  • Polychaeta


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9.

The universal recipient blood group is :

  • O (+ ve)

  • AB (+ ve)

  • O (- ve)

  • AB (- ve)


10.

Hydrophytes are characterised by :

  • thick and large leaf

  • delicate and mucilagenous stem

  • short spinous stem

  • all of the above


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